Method and apparatus for continuous finishing hot-rolling a steel strip

摘要

A method and apparatus for continuously finishing hot-rolling steel strips includes partially joining a rear end (2a) of a preceding steel strip and a leading end (3a) of a succeeding steel strip after the strips have passed through a rough hot-rolling step. The joint is flattened. The joint is rolled with a first stand (F1) of a tandem rolling mill (50). The mill is provided with a plurality of stands that includes a pair of work rolls (51) and backup rolls (52) and/or intermediate rolls, so that a compression stress acts at the unjointed section of the strips in the longitudinal direction of the joint while tracking the joint. Shape-control-rolling is performed on the joint with a second and succeeding stands so that a section of the steel strip other than the joint is subjected to the shape-control-rolling at all the stands.